Senior Mission Support Administrator — TS/SCI

Signature Federal Systems , LLC; Chantilly (VA); On-site; USD 85,000 - 115,000; Full time

Job summary

Signature Federal Systems, LLC seeks a Mission Support Administrator (Full Performance) in the WMA area. Active TS/SCI clearance with full scope polygraph is required to perform end-to-end workflow management, administrative support, and training of junior staff.

The role emphasizes independent problem solving, policy interpretation, and cross-functional coordination across programs, with minimal supervision and responsibilities that vary by assignment.

Qualifications

• Active TS/SCI clearance with full scope polygraph is required.
• Minimum four years of administrative support experience.
• Strong written and oral communication skills.
• Proven ability to interpret policies and apply regulations.

Responsibilities

• Provide end-to-end administrative support for programs/work units.
• Lead training and guidance for less experienced contractors.
• Plan, schedule, coordinate meetings, and track requirements.
• Prepare status reports and briefings for management.

Skills

TS/SCI clearance

MS Office proficiency

Time management

Analytical thinking

Communication skills

Education

High School Diploma or GED

Associate’s or Bachelor’s Degree (preferred)

Tools

Microsoft Office Suite (PowerPoint, Word, Outlook, Excel)

Job description

Signature Federal Systems, LLC seeks a Mission Support Administrator (Full Performance) in the WMA area. Active TS/SCI clearance with full scope polygraph is required to perform end-to-end workflow management, administrative support, and training of junior staff.

The role emphasizes independent problem solving, policy interpretation, and cross-functional coordination across programs, with minimal supervision and responsibilities that vary by assignment.